Q: Why is S32750 susceptible to embrittlement?
A: If used for prolonged periods at elevated temperatures, these steels are susceptible to the formation of embrittling phases-1-2.
Q: What manufacturing processes are covered by ASTM A790?
A: The standard covers both seamless and straight-seam welded manufacturing processes for pipe-1-2.
Q: How is the pipe heat treated?
A: A solution annealing heat treatment at 1025-1125°C followed by rapid quenching is required to achieve the proper microstructure and corrosion resistance-10.
Q: Is S32750 pipe weldable?
A: Yes, it has good weldability, but proper procedures and filler metals must be used to maintain the corrosion and mechanical properties in the weld zone-4.
Q: What tests does ASTM A790 require?
A: The standard requires mechanical, hydrostatic, and nondestructive electric tests. Optional supplementary tests can be specified for more stringent requirements-1-2.
